How to convert 2D image into matrix 3D ? ?

Hi everyone, I have a duty from my lecturer before the 25th of August 2017 about image compression. I am assigned to make compression image analysis with three methods (Wavelet haar, Huffman coding, and Run Length Encoding) at once in a single runing compression program. I am given the pseudocode logic flow as a hint for the compression process, which I inserted in the notepad file. The image I have is a color image with dimensions of 1285 x 720. Please help me to complete my task. Thank you in advance.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

Answer 1

[Walter Roberson]

color images are already 3D arrays when they are read in.

The exception to this is "pseudocolor images" (.gif are sometimes pseudocolor), which which case you get a 2D array and a colormap:

[image_data, color_map] = imread('TheFileNameGoesHere');
if ~isempty(color_map)
   image_data = ind2rgb(image_data, color_map);
end